The original Star Trek series might have only lasted three years, but it explored significant political and cultural issues—despite it oftentimes being looked over as purely playful and kitsch. The cult TV show is celebrating its 50th birthday today, and NPR explores how the show was "much more than a five-year mission." From an episode showing the absurdity of racism through an alien war, to Captain Kirk and Lt. Uhura's interracial kiss, creator Gene Roddenberry managed to weave essential social commentary into a show about space exploration in the '60s. Live long and prosper—and read more at NPR.